Protection mechanism for looms



Aug. 13, 1929.

J. PANSY PROTECTION MECHANISM Fon Looms I Filed March 192v 2 Sheets-Sheet 1 dztame s I Aug. 13, 1929. J. PANSY PROTECTION MECHANISM FORLOOMS Fil'ed March 26, 1927 2 Sheets-Sheet 2- [Wen/or llosc ofi Pansy J5 fltzorne .9 2

Patented Aug. 13, 1929.

UNETED STATES PATENT OFFICE.

JOSEPH IPANSY, OF CENTRAL FALLS,,RHODE ISLAND, ASSIGNOR TO GBO'MITON &KNOWLES LOOM WORKS, OI! WORGEFJTER, MASSACHUSETTS, A CORPORATION OFMASSACHUSETTS.

PROTECTION MECHANISM: FDR LOOMFS.

Application filed March 26, 192".

This invention relates to protector mechanism for looms and it thegeneral object of the invention to provide means for tin-owing off thepower and applying the brake before the lay is stopped abruptly by thehunter without lessening the time allowed for the flight of the shuttle.

The usual protector mechanism employs a rolling rod mounted on the layand having at least one forwardly projecting dagger. Fingers secured tothe rod engage the shuttle binders and when'the shuttle is properlyhoned the rod will roll to move the dagger out of the path of a hunterfixed to the loom frame. As generally employed the effect of theprotection is to throw off the shipper handle and apply the brake at thesame time that the dagger engages the hunter to stop the motion of thelay. With this arrangement it is found that in heavy or fast run ninglooms the power is actually on when the dagger engages the hunter. Thereason for this is that the lock depended upon to hold the shipperhandle in running position acts something like a toggle lock in that thelast part of the movement of the shipper handle merely locks the latterin position, the power having been put on :ompletely a short time priorto the end of the movement of the shipper handle. As a result of thiswhen the handle is being knocked off it must he brought hack an apneciahle distance to effect unlocking before it is able to throw off thepower. During this short interval the drive for the loom is slightlytighter than normal and it is found that when the lay strikes the firedhunter the power still on.

It is an important feature of my present invention to provide meanswhere )y the brake may he applied before the dagger engages the hunterwithout shortening the time allowed for the flight of the shuttle. I amaware that devices have been proposed heretofore for applying the brakebefore the dagger engages the hunter, but in each of these instances themechanism is so operated as to shorten the time available for thepassage of the shuttle. In the cycle of the pick the flight of theshuttle will ordinarily occupy the time lapsing hetween picking andprotecti The speed at which a loom may he v his Serial No. 178,716.

parts of the loom so as to take full advantage of the time allowed theshuttle to pass through the shed. Any mechanism, therefore, whichlessens the time allowed to the flight of the shuttle would cut down thespeed of the loom.

It is a more detailed object of my invention to provide a pair ofdaggers each effective to stop the loom, one being the usual daggerwhich works with the hunter to cause the sudden stopping of the lay, andthe other being an auxiliary dagger operative to throw off the brake andshipper handie prior to the operation of the main dagger. its set forthherein these daggers maintain a fixed angular relation and when the maindagger starts to move so as to clear its hunter the auxiliary daggerwill also start to move, but because the latter is light it can clearits hunter in less time than the main dagger can clear its hunter. Forthis reason the auxiliary hunter, when not moving to clear its hunter,can set the brakes before the main dagger engages its hunter,

With these and other ohjects which will appear as the descriptionproceeds, my id vention relates to the arrangements and combinations ofparts hereinafter set forth, and more particularly pointed out in theclaims.

In the dCCl1l1 Jtl-Ilylllg drawings, wherein a cmivenient embodiment ofmy invention. is shown,

Fig. l a top plan view of a portion of the loom having my improvementsapplied thereto,

Fig. 2 is a vertical section on line 2-2 of Fig. 1 and showing the partsin normal running position,

Fig. 3 is a fragment-a l view of a portion of Fig. 2 showing the shipperand brake handles in non-running position,

Figs. 4:, 5 and 6 are enlarged sections on line JP-4 of Fig. 1 showingthe parts in different positions,

Fig. 7 is an enlarged horizontal section on line 7-7 of Fig. 2,

F 8 is a diagrammatic view showing the relation of the two daggers andthe parts with which they cooperate to effect stopping ofthe looiri, andv I i 9 "letailed vertical section on line lid tion as applied to aloomhaving a center fillingstop motion and have applied my auxiliary partsto the rolling rod of the protector mechanism and the bar of the fillingstop motion. In Figs. 1 and 2 I have indicated the loom frame having abreast beam 11 and a crank shaft 12. The crank shaft may be driven inany approved manner but I have shown herein a form of drive usual forsilk looms, the same comprising a motor 18 having a pinion 14 whichmeshes with a gear 15. Said gear is provided with a grooved sleeve 16 tocooperate with the forked end of a shipper lever 17 pivoted as at 18 toa bracket 19 supported by the loom frame. A friction disk 20 is keyed tothe shaft 12 and has a friction surface 21 to cooperate with acorresponding friction surface22 formed on the inner face of the gear15. A shoulder 23 fastened to the crank shaft 12 limits endwise movementof the disk 20. y

The shipper lever 17 extends forwardly and is provided with anupstanding stud 24 which is received by an oblique cam slot 25 formed onthe lower end of a shipper handle '26 pivoted to the loom frame as at27. WVhen the shipper handle is in the position shown in F ig. 2 the camslot and stud are so related as to move the gear 15 against the disk 20and causeturning of crank shaft 12 by motor 13.

The brake motion includes a relatively heavy lever 27 pivoted as-at 28to the rear part of the loom frame and being connected as at 29 by meansof an adjustable connector 30 to a flexible friction band 31, theforward end of which is anchored to the loom frame as at 32. A heavytension spring 33 is interposed between the lever 27 and a fixed lug 34by means of an adjustable connector 35. A forwardly extending rod 36 ispivotallyconnected at the rear end thereof to the lever 27 at 37 whilethe forward end thereof is connected as at 38 to a lever 39 rotatableabout the shipper shaft 27.- A brake handle 40 is secured to rocking bar41 forming part of the center stop motion and said handle 40 is providedwith two notches of different depths, both of which are proportioned toreceive a roller 42 mounted on the lever 39. The high notch 43 receivessaid roller whilethe loom is running and tends to hold the rod 36 inrearward position thus lifting the flexible strap 31 off the brake wheel44 which is fastened to the crank shaft 12. The low notch 45 receivesthe roller when the brake is to be applied.

The protector mechanism may be of the usual form and comprises aprotector rod 46 pivotally mounted to the lay L and having protectorfingers 47 one of which is shown in the drawings. Each fingercooperateswith a binder 48 the position of which is determined byshuttles and said rod46 is provided with two forwardly projecting rel.-

other end under the da er 49 ativcly heavy daggers 49 only one of whichis shown in Fig. 1. A torsion spring 50 lics around the protector rod 46and has one end extended under the lay as at 51 and the We and theeffect of said spring is to raise the dagger.

The parts for cooperating with the heavy dagger 49 are shown in detailin Figs. 0 and 7, where it will be seen that a buntcr lever 52 ispivoted as at 53 to the underside of the breast beam 11. Said buntcrlcvcr has an inwardly projecting portion which lics opposite a shockabsorber 54 which may be a pad of rubber and the outer end of said leverextends in front o'l' the brake handle 40 and a lug fastened with theshipper handle 26. Said buntcr lever is provided with a notch 56 asshown in Figs. 4, 5 and 6 and because of the work which must be done bysaid bunter lever, it must be of substantial proportions. The under sideof the breast beam may be provided with a guide plate57 having arcarwardly and upwardly inclined lower face 58 which may guide thedagger 49 toward. the notch 56 when a shuttle is properly boxed.

The rocking bar 41 is pivoted in bearings 0 on the under side of the hrast beam and has a d(,)wnwardly extending oliset ($1 for the dagger 49.Said rocking bar cooporatcs with the filling stop motion, which is ofthe usual construction, and serves when rocked in a right hand directionas viewed in Figs. 2 and 4 to move the roller 42 from the high dwell 43to the low dwell 45, thereby applying the brake 31.

The mechanism thus far dcscribcd is of common construction and as suchforms no part of my present invention.

In carrying my improvements inlo cll'cct I provide an auxiliary daggerto be moved with the main dagger on the protector rod 46, and I furtherprovide a buntcr mounted on the rocking bar 41, of the lilling stopmotion and so arrange and proportion said parts that they will applybrake 31 before dagger 49 engages hunter lever 52. Accordingly, I secureto 'the protector rod 46 a holder made in two parts as shown in Fig. 9,screw 71 fastening the parts together and clamping them tightly on tothe rod 46. A comparatively light dagger 72 is secured into said holder70 and has a forwardly project ing dagger end 73 which is not so bluntas the corresponding end of l'lllf llltllll dagger 49. Furthermore, Iprovide a hunter 74 which is secured to the rocking bar -ll by means ofset screw 75. Said buntcr has formed on the lower portion thereof asmall notch 76 and that portion of the hunter lying above the notchextends rrarwardly almost in a straight line for a. short dis tance soas to engage the top of the auxiliary dagger when said bunter iscngagcril by the latter and is rolled thereby to discon- The notch 76 onthe hunter nect the dagger and hunter. is not as deep as the notch 56lever.

ln the operation of the loom the lay L moves haclnvardly and forwardly,the shut tle ti being picked when the lay is hall: way back or onso-called top center and arriving on one of the boxes approximately halfa pick later. [is the shuttle is boned the main dagger 49 will. bedepressed and as the lay advances the hunter lever will remain in theposition shown in Fig. 7, being unengaged by the main dagger. Theoperation of the main dagger in moving clear of the hunter lever setforth diagrammatically in Fig. 8, where the dotted line 100 indicatesthe path followed by the point of the dagger 419 when the shuttle isproperly boxed and wherein the full curve line 101 indicates the pathfollowed by the dagger l9 when it is to engage the notch 56.

lVhen the lay has moved tori *ardly a sufticient distance for the maindagger -19 to rive at point 102 indicated in Fig. 8 and for theauxiliary dagger 72 to arrive at point 103, said daggers will begin totake one or the other of the courses indicated in full and dotted curvedlines, 100, 101, 10 i and 105 in said figure. a

The upper solid curved line 10 1- indicates the path to be followed bythe auxiliary dagger when the shuttle is improperly honed, whereas thelower dotted curved line 105 indicates the path to he followed when theshuttle is boxed properly. Because of the fact that both hunters aresecured to the same rod full lines 101. and lO-Cl will he eoncentricwith the center of the lay and the dotted lines 100 and 105 will hegenerated by two points which are a 'lixed distance apart and movingilorwardly with tl e lay. lhcse curves in dotted lines will not beconcentric with the center oil? the lay because they are produced by acombining oi. the rocking movement of the protector rod with the forward movement ol? the lay.

The notch 76 is so shallow that it requires but a small movement on thepart of the auxiliary dagger to clear it so that a comparatively shorttravel only beyond. the point 103 as shown in Fig. 8, is necessary tohave the auxiliary lever clear the hunter Tel. The notch in the hunterlever 52, however, l'ieing larger, must be spaced farther from the point102 in order to give the main dagger sullicient time to move downwardlyto clear said notch. Because of the relation described in connectionwith Fig. 8 it is possible for the light dagger to start angularmovement of the rocking bar 41 hetero the main dagger engages the hunterlever. .lhis result is accomplished without taking any time from theflight of the shuttle.

lironi foregoing it will be seen that l have ygirovided a very simplefor throwing oil the power and applying the brake of a loom prior tostopping of the lay by the protector mechanism, and that this result isaccomplished without lessening the time allowed for the flight of theshuttle.

l urthermore it will be seen that the main part of the protectormechanism is of uruurl construction so that the auxiliary devices may beadded to looms already built.

Having thus described. my invention it will be apparent that changes andinodilications may be unule therein by those skilled in the art withoutdeparting from the spirit and scope of the invention, and I do not wishto be limited to the details herein disclosed but what I claim is:

1. In. stopping mechanism for a loom having a lay and a shuttle, shipperand. brake mechanism, a protector rod movably mounted on. the lay andcontrolled as to angular position relatively to the lay by the sluittle,a main dagger and an auxiliary dagger both secured to the protector rodand moving with the latter in, fixed angular position, a main hunter tocooperate with main dagger to elli'cct sudden stoppage of the loonn arolling rod mounted on a fixed part of the loom and extendingsubstantially parallel to the protectm' rod, an auxiliary hunter securedto the rolling rod to cooperate with the auxiliary dagger to operate theshipper and brake niechanism said auxiliary dagger cooperating with theauxiliary bimter to etfeet angular movement of the rolling rod on theforward inovcn'ieut ot the lay prior to the engagement of the mainhunter and main dagger.

2. Il n stopping meeluniism for a loom having a lay and a shuttle,shipper and brake mechanism a yn'otector rod movably mounted on the layand controlled as to angular position relatively to the lay by theshuttle, a main dagger and an auxiliary daggrn: both secured to theprotector rod and moving with the latter in fixed angular position, amain b'l'lnter to cooperate with main dagger to cl'l'ect sudden stoppageol the loom, a rolling rod mounlr-ul on a fixed part of the lOOll'l andextending substantially parallel. to the protector rod, an auxiliaryhunter secured to the rolling rod to cooperate with the auxiliary(tagger to oper ate the shipper and brake mechanism. said auxiliarydagger coopm'ating with the auxiliary hunter to el'li'ect angularmovement 01 the rolling rod on the ilorward movement oi? the lay priorto the engagement of the main hunter and main dagger, the main andauxiliary hunters each having a notch to receive the correspondingdagger, the notch in the main hunter being larger than the notch in theauxiliary hunter.

ln testim. iy wher l have horruinto

